Dandy-roll.



J. R. SINCLAIR.

DANDYROLL.

APPLICATlON FILED OCT. 22. m4.

Patented May 25, 1915.

% JNVENTOI|1 WITNESSES:

A TTOR NE Y.

JOHN R. SINCLAIR, 0E HOLYOKE, MASSACHUSETTS.

DANDY-ROLL.

Specification of Letters Patent.

Patented May 25, illllld.

Application filed October 22, 19,14, Serial No. 868,000.

'the'outer gauze covering of the roll by which the letters orconfiguration for imparting the water mark are carried, removable fromthe openwork or skeletonized cy-.

lindrical supporting structure or body so that different outer gauzecoverings may be interchangeably used on one body, with the result ofmaterial saving in a paper mill, especially where comparatively smallquantities of paper with a given water mark are to be produced.

The invention is described in conjunction with the accompanyingdrawings, and set forth in the claims.

In the drawings :Figure 1 is a plan view of a portion of the length of adandy roll,

in which my improvements are embodied. Fig. 2 is a cross sectional viewon line 22, Fig. i. Fig. 3 is a partial longitudinal section, on anenlarged scale, on line 33, Fig. 1. Fig. t is an enlarged cross sectionfor more clearly showing certain features of construction, than is donein Fig. 2.

The dandy roll body or open work cylindrical structure which supportsthe outer gauze covering A may be of any of the several and well knownand approved constructions, the same comprising end heads a withjournals 5, ring-like or annular supports 03, parallel longitudinalwires 6 running from end to end of the roll-and connected with theannular supports and the winding wires f, the spacing betweentheconvolutions of which are uniform.

In this new dandy roll or paper machine cylinder, a foraminous covering18 1s supported directly by and secured on the winding wires, the samenearly, but not quite circurnferentially enclrcllng the body; but

leaving a longitudinal space 9 between its approached parallel edges.

D D represent a pair of strips of flat rigid metal adapted to bediposed, side by side, in edgewise contact in the aforementionedlongitudinal space 9. These strips have inwardly extended regularlyspaced tubular 6G studs it made with recesses 71 i in their oppositesides and having convergently formed ends 70 whereby they are adaptedfor entrance between and engagement with the winding wires, serving asretainers for the said strips in their places in the space or channel g,bottoming on the outer surface of the winding wires and having theirouter faces flush or in continuity with the contour of the surface ofthe aforementioned layer B of foraminous material.

The outer gauze roll covering A (which carries the watermarkingappliances as usual) has the edge portions thereof overlapped across theouter sides of, and secured to, said flat rigid strips d: d, suchsecurity being by stitching through small perforations therefor in theplates or by soldering. lVhen this outer covering is to be applied andretained on the roll it is brought to encircling engagement about thebody, its edgewise provided strips being disposed in the longitudinalspace or channel 9, the studs it h, of-which a suflicient number areprovided, being forced or snapped to their engagements between thewinding wires. The edges of the gauze covering A are so extended clearto the meeting edges of the strips D D that when such strips are matchedtogether and detachably confined t in their places the said covering Ais to all intents and purposes circumferentially continuous and with notendency to leave a seam mark perceptible in the finished paper. Whendesired to substitute one gauze outer cover A. for one which had beenheretofore used on the roll, it is only necessary to pry the strips l) Din the proper direction whereby the studs thereof become disengaged fromthe winding wires, leaving the covering free to be unwrapped from theroll body which is then in readiness for the reception of anothercovering of like structural character; The studs are preferably tubularand the metallic strips or long nar- 105 row plates D are drilled with agreater or less number of perforations m, rendering same foraminous indegree substantially corresponding to the character of the portion ofthe body which includes the layer B of coarse gauze or equivalentmaterial.

I claim p 1. In a dandy roll, the combination withthe cylindricalopenwork supporting structure including the usual. regularly spacedwinding wires, and a foraminous covering supported by the winding wires,nearly but not quite circumferentially encircling same, and leavin alongitudinal space between its approached parallel edges, of a pair ofstrips of flat rigid material adapted to be disposed side by side insaid longitudinal space, and having inwardly extended regularly spacedmembers adapted for entrance between, and for engagement with, thewinding wires, and the outer gauze roll covering having the edgeportions thereof overlapped across the outer sides oi and secured tosaid fiat rigid strips.

2. In a dandy roll, the combination with the cylindrical openworlrsupporting structure including the usual regularly spaced winding wires,and a foraminous covering supported by the winding wires, nearly but notquite circumferentially encircling same, and leaving a longitudinalspace between its approached parallel edges, of a pair of strips of flatrigid material adapted to be disposed side by side in said longitudinalspace, and having inwardly extended regularly spaced studs made withopposite recessed sides and convergently formed ends,

adapted for entrance between, and for engagei'nent with, the windingwires, and the outer gauze roll covering having the edge portionsthereof overlapped across the outer sides of, and secured to, said flatrigid strips.

351m a dandy roll, the combination with the cylindrical openworksupporting structure -including the usual regularly spaced windingWires, and a foraminous covering supported by the winding wires, nearlybut not quite circumferentially encircling same, and leaving alongitudinal space between its approached parallel edges, of a pair ofstrips of flat rigid material adapted to be disposed side by side insaid longitudinal space, and having inwardly extended regularly spacedtubular studs made with opposite recessed sides and convergently formedends adapted for entrance between, and for engagement with, the windingWires, and the outer gauze roll covering having the edge portionsthereof overlapped across the outer sides of, and secured to, said fiatrigid strips.

4. In a dandy roll, the combination with the cylindrical openworksupporting structure including the usual regularly spaced winding wires,and a foraminous covering supported by the winding wires, nearly but anot quite circumferentially encircling same,

and leaving a longitudinal space between its approached parallel edges,of a pair of strips of fiat rigid material made with perforationstherethrough adapted to be disposed side by side in said longitudinalspace, and having inwardly extended regularly spaced tubular studs madewith opposite recessed sides and convergently formed ends adapted forentrance between, and for engagement with, the winding wires, and theouter gauze roll covering having the edge portions thereof overlappedacross the outer sides of, and secured to, said flat rigid strips.

Signed by me at Springfield, Mass, in presence of two subscribingwitnesses.

JOHN R. SINCLAIR.

Witnesses:

HENRY A. BOOTH, NM. S. BELLOWS.

